package com.sky.service.impl;

import com.github.pagehelper.Page;
import com.github.pagehelper.PageHelper;
import com.sky.constant.MessageConstant;
import com.sky.constant.StatusConstant;
import com.sky.context.BaseContext;
import com.sky.dto.DishDTO;
import com.sky.dto.DishPageQueryDTO;
import com.sky.entity.Dish;
import com.sky.entity.DishFlavor;
import com.sky.exception.DeletionNotAllowedException;
import com.sky.mapper.DishFlavorMapper;
import com.sky.mapper.DishMapper;
import com.sky.mapper.SetMealDishMapper;
import com.sky.result.PageResult;
import com.sky.service.DishService;
import com.sky.vo.DishVO;
import lombok.extern.slf4j.Slf4j;
import org.springframework.beans.BeanUtils;
import org.springframework.beans.factory.annotation.Autowired;
import org.springframework.stereotype.Service;
import org.springframework.transaction.annotation.Transactional;

import java.util.ArrayList;
import java.util.List;

@Service
@Slf4j
public class DishServiceImpl implements DishService {
    @Autowired
    private DishMapper dishMapper;
    @Autowired
    private DishFlavorMapper dishFlavorMapper;
    @Autowired
    private SetMealDishMapper setMealDishMapper;

    @Override
    @Transactional
    public void save(DishDTO dishDTO) {
        //向菜品表插入一条数据
        Dish dish =new Dish();
        BeanUtils.copyProperties(dishDTO,dish);
        dishMapper.insert(dish);
        //向口味表插入多条数据
        Long id = dish.getId(); //得到菜品id
        List<DishFlavor> flavors = dishDTO.getFlavors();
        if(flavors!=null&&flavors.size()>0){
            flavors.forEach(dishFlavor -> {
                dishFlavor.setDishId(id);
            });
            dishFlavorMapper.insertBatch(flavors);
        }
    }

    @Override
    public PageResult pageQuery(DishPageQueryDTO dishPageQueryDTO) {
        PageHelper.startPage(dishPageQueryDTO.getPage(),dishPageQueryDTO.getPageSize());
        Page<DishVO> page = dishMapper.pageQuery(dishPageQueryDTO);
        long total = page.getTotal();
        List<DishVO> result = page.getResult();
        return new PageResult(total,result);
    }

    @Override
    @Transactional
    public void delete(List<Long> ids) {
        //判断当前菜品是否能够删除--是否存在起售中的菜品
        for (Long id : ids) {
            Dish dish = dishMapper.getById(id);
            if(dish.getStatus()!= StatusConstant.DISABLE)
                throw new DeletionNotAllowedException(MessageConstant.DISH_ON_SALE);
        }
        //判断当前菜品是否能够删除--是否被套餐关联
        List<Long> setMealIdByDishId = setMealDishMapper.getSetMealIdByDishId(ids);
        if(setMealIdByDishId != null &&setMealIdByDishId.size()>0){
            throw new DeletionNotAllowedException(MessageConstant.CATEGORY_BE_RELATED_BY_SETMEAL);
        }
        //删除菜品表的菜品数据
//        for (Long id : ids) {
//            dishMapper.delete(id);
//            dishFlavorMapper.delete(id);
//        }
        //删除菜品关联的的口味数据
        dishMapper.deletes(ids);
        dishFlavorMapper.deletes(ids);
    }

    @Override
    public DishVO select(Long id) {
        Dish dish = dishMapper.select(id);
        List<DishFlavor> dishFlavors= dishFlavorMapper.select(id);
        DishVO dishVO = new DishVO();
        BeanUtils.copyProperties(dish,dishVO);
        dishVO.setFlavors(dishFlavors);
//        BeanUtils.copyProperties(dishFlavors,dishVO);
        return  dishVO;
    }

    /**
     * 修改菜品
     * @param dishDTO
     */
    @Override
    public void update(DishDTO dishDTO) {
        //修改菜品表数据
        Dish dish = new Dish();
        BeanUtils.copyProperties(dishDTO,dish);
        dishMapper.update(dish);
        //删除口味表数据
        dishFlavorMapper.delete(dishDTO.getId());
        //插入口味表数据
        List<DishFlavor> flavors = dishDTO.getFlavors();
        if(flavors!=null && flavors.size()>0){
            flavors.forEach(dishFlavor -> {
                dishFlavor.setDishId(dishDTO.getId());
            });
            dishFlavorMapper.insertBatch(flavors);
        }
    }

    /**
     * 起售禁售菜品
     * @param status
     * @param id
     */
    @Override
    public void startOrStop(Integer status, Long id) {
        Dish dish = Dish.builder()
                .status(status)
                .id(id)
                .build();
        dishMapper.update(dish);
    }

    @Override
    public List<Dish> getByCategoryId(Long categoryId) {
        List<Dish> list = dishMapper.getByCategoryId(categoryId);
        return list;
    }


    /**
     * 条件查询菜品和口味
     * @param dish
     * @return
     */
    public List<DishVO> listWithFlavor(Dish dish) {
        List<Dish> dishList = dishMapper.list(dish);

        List<DishVO> dishVOList = new ArrayList<>();

        for (Dish d : dishList) {
            DishVO dishVO = new DishVO();
            BeanUtils.copyProperties(d,dishVO);

            //根据菜品id查询对应的口味
            List<DishFlavor> flavors = dishFlavorMapper.select(d.getId());

            dishVO.setFlavors(flavors);
            dishVOList.add(dishVO);
        }

        return dishVOList;
    }

}
